Electrophotographic Resin Layer Low-Temperature Resistance Stability
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Solution Overview
Problem
Electrophotographic members experience a significant increase in resistance value under low-temperature environments, such as 0°C, which affects the stability and quality of electrophotographic images formed in electrophotographic image-forming apparatuses.
Innovation Solution
An electrophotographic member is designed with an electroconductive substrate and a resin layer containing specific cation structures and inorganic particles with a hydrophobicity degree of 40% to 80%, which helps in maintaining a stable resistance value by reducing the diffusion of anions and preventing aggregation, thereby ensuring consistent image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electroconductive rollers are used, then the electrophotographic member can perform basic image formation, but the resistance value increases significantly in low-temperature environments
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin layer by incorporating specific cation structures (formulae 1-6) with appropriate anions, hydrophobic inorganic particles, and controlling the content of hydroxyl groups. These parameter changes enable the resin layer to maintain stable resistance values across a wide temperature range, particularly improving performance at low temperatures where conventional materials fail.
Solution Approach 2:
The patent creates a composite resin layer combining multiple components: cations with specific structures, anions, hydrophobic inorganic particles, and resin base materials. This composite structure leverages the synergistic effects of each component to achieve resistance value stability that none of the individual materials could provide alone, especially in low-temperature conditions.
2Reliability
If the resistance value is reduced for better electroconductivity, then image formation quality improves, but stability under varying temperature conditions deteriorates
Solution Approach 1:
The patent optimizes the concentration and structural parameters of cations and anions in the resin layer to achieve a balance between electroconductivity and temperature stability. By carefully controlling the content of ionic compounds and the structural characteristics of cations (formulae 1-6), the resin layer achieves both low resistance values for quality image formation and stable resistance values across temperature variations.
3Ease of manufacture
If hydrophilic inorganic particles are used in the resin layer, then dispersion and processing are easier, but resistance value stability in low-temperature environments deteriorates
Solution Approach 1:
The patent changes the surface property parameter of inorganic particles from hydrophilic to hydrophobic by applying hydrophobic treatments or selecting hydrophobic particle materials. This parameter change improves low-temperature resistance stability while the particles maintain good dispersion characteristics through controlled surface treatment and compatibility with the resin matrix.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses the increase in resistance value under low-temperature conditions, ensuring the electrophotographic member maintains electroconductivity and stability, leading to high-quality image formation in electrophotographic image-forming apparatuses.
Implementation Method 1
inorganic particles wherein a hydrophobicity degree calculated from the inorganic particles extracted from the resin layer is 40% or more and 80% or less
Data Source
AI summary
Provided is an electrophotographic member that shows a small increase in electrical resistance value even when used under a low-temperature environment. The electrophotographic member is an electrophotographic member including an electroconductive substrate and a resin layer on the electroconductive substrate, wherein the resin layer contains an anion, inorganic particles having a hydrophobicity degree of 40% or more and 80% or less, and a resin having a specific cation structure.